}
        return new BindingPredicate(subjectReference.atState(role.getTargetState()));
    }

    private List<BindingPredicate> mapInputs(List<? extends ModelReference<?>> inputs) {
        if (inputs.isEmpty()) {
            return ImmutableList.of();
        }
        ImmutableList.Builder<BindingPredicate> result = ImmutableList.builderWithExpectedSize(inputs.size());

        }
    }

    private void addRule(RuleBinder rule, NodeAtStateIndex index, ModelBinding binding) {
        Reference reference = new Reference(rule, index, binding);
        BindingPredicate predicate = binding.getPredicate();
        if (predicate.getPath() != null) {
            if (predicate.getScope() != null) {
                throw new UnsupportedOperationException("Currently not implemented");